After the death of incumbent [[RINO]] senator [[Hiram Johnson|Hiram Warren Johnson]], then-governor of [[California]] [[Earl Warren]] appointed Knowland as an interim to the seat.<ref name="William Knowland: A Featured Biography">[https://www.senate.gov/senators/FeaturedBios/Featured_Bio_KnowlandWilliam.htm William Knowland: A Featured Biography]. ''United States Senate''. Retrieved April 22, 2021.</ref> Warren was later successfully nominated to the [[United States Supreme Court]] by President [[Dwight Eisenhower]]. | After the death of incumbent [[RINO]] senator [[Hiram Johnson|Hiram Warren Johnson]], then-governor of [[California]] [[Earl Warren]] appointed Knowland as an interim to the seat.<ref name="William Knowland: A Featured Biography">[https://www.senate.gov/senators/FeaturedBios/Featured_Bio_KnowlandWilliam.htm William Knowland: A Featured Biography]. ''United States Senate''. Retrieved April 22, 2021.</ref> Warren was later successfully nominated to the [[United States Supreme Court]] by President [[Dwight Eisenhower]]. |